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Date:   Thu, 16 May 2019 19:56:28 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     sunqiuyang <sunqiuyang@huawei.com>
Cc:     linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net, yuchao0@huawei.com,
        miaoxie@huawei.com, fangwei1@huawei.com, stummala@codeaurora.org
Subject: Re: [PATCH v2 1/1] f2fs: ioctl for removing a range from F2FS
Message-ID: <20190517025628.GF31704@bombadil.infradead.org>
References: <20190517021647.43083-1-sunqiuyang@huawei.com>
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On Fri, May 17, 2019 at 10:16:47AM +0800, sunqiuyang wrote:
> +++ b/fs/f2fs/f2fs.h
> @@ -423,6 +423,8 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
>  #define F2FS_IOC_SET_PIN_FILE		_IOW(F2FS_IOCTL_MAGIC, 13, __u32)
>  #define F2FS_IOC_GET_PIN_FILE		_IOR(F2FS_IOCTL_MAGIC, 14, __u32)
>  #define F2FS_IOC_PRECACHE_EXTENTS	_IO(F2FS_IOCTL_MAGIC, 15)
> +#define F2FS_IOC_SHRINK_RESIZE		_IOW(F2FS_IOCTL_MAGIC, 16,	\
> +						struct f2fs_resize_param)

Why not match ext4?

fs/ext4/ext4.h:#define EXT4_IOC_RESIZE_FS               _IOW('f', 16, __u64)